St. Leo is a permanently closed Catholic parish in St. Louis City, MO. The parish was founded in 1888. The parish closed in 1978.
- Year founded: 1888
- Year closed: 1978 (90 years)
- Territory merged into: St. Bridget of Erin - St. Louis City
Formed out of Saint Bridget and Saint Teresa. Reopened as a shrine in 1971 before formally closing in 1978.
As of 2022, building is within the footprint of the new NGA facility, and the cross streets where it was located have been removed.
The building was demolished in 1978.
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